<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div
    {
      border:15px solid transparent;
      width:800px;
      height: 500px;
      padding:10px 20px;
    }

    #round
    {
      -webkit-border-image:url(../img/borderback.png) 30 30 round; /* Safari 5 and older */
      -o-border-image:url(../img/borderback.png) 30 30 round; /* Opera */
      border-image:url(../img/borderback.png) 30 30 round;
    }
  </style>
</head>
<body>
<div id="round">这里，图像平铺（重复）来填充该区域。</div>
</body>
</html>
